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Finding the Fourth Proportional to 8,662.60, 12,989.10 and 3,731.40

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Solution

The fourth proportional to 8,662.60, 12,989.10 and 3,731.40 is: 5,595.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,662.60 : 12,989.10 = 3,731.40 : x
  2. Step 2: Convert to fraction form
    8,662.60/12,989.10 = 3,731.40/x
  3. Step 3: Cross multiply
    8,662.60x = 12,989.10 × 3,731.40
  4. Step 4: Simplify right side
    8,662.60x = 48,467,527.74
  5. Step 5: Solve for x
    x = 48,467,527.74/8,662.60
  6. Step 6: Final answer
    x = 5,595.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.